Teknic CLEARPATH CPM-MCVC-3421S-RLN, Руководство пользователя

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C
L E A R
P
A T H
M C / S D U
S E R
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A N U A L
R
E V
. 3 . 0 9
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T
EKNIC
, I
NC
. T
EL
. (585) 784-7454
A
BOUT
E
ND
-
OF
-T
RAVEL
S
TOPS
End-of-travel stops are typically installed to prevent the moving element
of a linear axis from flying off the machine in the event of a use or control
error. There are a few common types of end stop to consider, but the final
choice depends on the application objectives and requirements.
H
ARD
B
LOCKS
This is usually a solid block of steel, aluminum, or hard plastic secured at
one or both ends of travel and positioned in such a way as to make even,
repeatable contact with a hard surface on the moving element. Hard
blocks are very effective at arresting motion, but can result in mechanical
damage when struck at high speeds.
In several modes, ClearPath must home to a hard stop to establish a home
reference position before functional positioning can begin.
E
LASTOMERIC
(
RUBBER
) S
TOPS
High durometer rubber stops (hard rubber) can also be used with
applications that use HardStop Homing. This type of end stop offers a
higher level of shock absorption and axis protection than hard blocks.
Spongy, low durometer rubber stops are not recommended in most cases.
They offer little benefit over a hard end stop during an axis crash.
P
NEUMATIC
(
DASHPOTS
)
Pneumatic hard stops (dashpots) offer excellent shock absorption
performance but are considerably more expensive than hard blocks.
Examples of specialized dashpots include the hydraulic cylinder in an
automobile shock absorber as well as many automatic door closers.
E
ND
S
TOPS AND
H
ARD
S
TOP
H
OMING
End stops from medium durometer rubber to steel can be used
successfully with Hard Stop Homing. When selecting end stops for a Hard
Stop Homing application consider the following:
•
Axes with low friction that are easily back driven can tolerate
“softer” rubber end stops and still achieve good homing
performance.
•
Higher friction applications and those that cannot be back
driven will generally require harder end stop material to achieve
best Hard Stop Homing performance.
•
Be prepared to test and experiment with different end block
materials to ensure proper homing operation with your
mechanical system.